Well, that was educafrustrational. Been fucking with Firefox on the new OS all day, trying to bring over my settings from the borked OS drive. (yeah I hate Sync.) At one point I figured out how to bring over my most recent bookmarks, was still trying to get the tabs to come back. Did some tinkering, and broke the FF profile. Fixed that and moved files over again, and upon launch.. huzzah! all tabs populated, bookmarks, extensions.. whew. Learning is fun! *drops bowling ball on crotch*